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Resource Documents by Gwak, Doo Young

Gwak, Doo Young; et al.
Effects of amplitude modulation on perception of wind turbine noise
Abstract: Wind turbine noise is considered to be easily detectable and highly annoying at relatively lower sound levels than other noise sources. Many previous studies attributed this characteristic to amplitude modulation. However, it is unclear whether amplitude modulation is the main cause of these properties of wind turbine noise. Therefore, the aim of the current study is to identify the relationship between amplitude modulation and these two properties of wind turbine noise. For this investigation, two experiments were conducted. In . . . Complete article »

Seong, Yeolwan; Lee, Seunghoon; Gwak, Doo Young; and Cho, Yoonho
Experimental study on rating scale for annoyance due to wind turbine noise
ABSTRACT: Wind turbine noise referred to as “swishing sound” causes annoyance due to the amplitude modulation of the aerodynamic noise from the blades. For that reason, many studies for rating scale realizing annoyance from the noise have been examined, but show little coherence with change of noise level. In the present study, an appropriate index for describing the annoyance tendency is suggested with jury test and correlation analysis. Twenty-eight stimuli created by numerical simulation for the test were provided and . . . Complete article »

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